Dish washing machine



April 14, 1942. H. H. FIsHER ,619.

' DISHWASHING momma Filed Sept. 3, 1940 Fin-1.

' INVENTOR. fiseaser h. Fzsuse A TTOE/VEK Patented Apr. 14, 194;

2,279,619 msn wssmno MACHINE Herbert H. Fisher, San Francisco, Calif. Application September 3, 1940, Serial No. 355,117

4 Claims. (01. 141 -9) This invention relates to dish washing machines and more particularly to closures therefor.

' Among the objects of the invention is to provide improved means for closing the splash com partment of dish washing machines.

Another object is to instantly stop the water splashing mechanism when a compartment door is opened.

Another object is to provide improved means washing tray.

Other objects and advantages will appear as the description progresses.

In this specification and the accompanying drawing the invention is disclosed in its preferred form. But it is to be understood that it is not limited to this form, because it may be embodied in modifications within the spirit of the invention as defined in the claims following the description. a

In the one sheet of drawings: Y

- tate when water is forcibly pumped therethrougih "for admitting'water and injecting soap into the' Fig. 1 is a front elevation of a dish washing machine constructed in accordance with this invention. The water trayis shown in vertical section on the line Il, Fig. 2..

Fig. 2 is a side elevation of the same, showing one door of the closure open.

Fig. 3 is a wiring diagram ofthe motor circuit having the safety stop switchesinterposed there- In detail the construction illustrated in the -drawing, referring first to Fig. 1, includes the water tray I, adapted to be mounted .upon a bench, table or any form of supporting stand, not shown.. This tray has the bottom 2, sides 3, 4 and the front and back 5, 6, surrounded by openingsv such as l8 are provided on opposite.

sides or the center of rotation and set at anangle .to the plane of rotation to cause the head to ro- The splash heads I9, 20 are similarly constructed and swiveled in the opposite ends of-the distributer head II. The rotation of the distributor head ll rotates the splash heads i9, 20. The

water within the tray flows. back from thesump l0, through the screen therein, to. the intake of the pump'i3 for vrapid redistribution of the wa ter at high velocity beneath the dish rack.

The dish rack is conventional and consists of a box like structurell, having an open bottom formed by the cross rods such as-22, to. hold dishes stacked on edge therein. This rack slidesin the angular guides 23, 24 fixed on the top flange 1 of the tray ,-for placement and removal from either side of the machine.

Pivot brackets such its 25, 26 are fixed to the flange I On opposite sides of the tray adjacent" to the recesses 8, 8. The water service pipe 21 extends up through the bracket 26 and has the self-closing valve 28 fixed thereon with the side outlet coupling 29, discharging through the pipe 28', into the pump 13. The liquid soap pump 30 is mounted upon the opposite bracket ar d has the outlet pipe 3!,

. thereon, which is alined with'the outlet coupling the top flange I. It is preferably formed of an integral casting-for stability and tapers from top tobottom, except at the sides where the recesses 8, 9 are iormed to clear the lower edges of the closed doors.

,The sump it is attached to the bottom or the tray and has a strainer and the elevated overflow pipe H. The sump is connected to the sewer or other outlet. The top 91' the over flow pipe is adapted to maintain a definite water level l2 in the tray. The centriiugal pump it is fixed to the botto of the tray and discharges through the coupling ll within the tray. The pump is driven by the 29 on the opposite side of the tray. These 0pposed outlets form the fixed pivots for the telescoping closure doors of the machine.

This closure consists of two segmental doors having the respective side plates l2, l3 and I4,

' 35. These doors. are completed by the tops 88,

31 telescoping one within the other and joined to their respective side plates 82-35 The radii of these doors are struck from the common axis of the outlet coupling 28, and the outlet pipe 3| upon which they pivot Ireely. The outer edges of each door are provided with rubber bumpers such as 38 and 38 respectively, that rest upon the flange I when the doors are closed within the top opening of the tray I. closed the inner. edges oithe doors overlap. Y

Thus assembled the splashpi soapy water wi th in the tray and the closure is retained and drains back into 'the tray.

motor'llmounted upon the bracket 18 attached to the tray. The rotary distributer head IT is mounted upon the discharge pipe of the pump within the packing coupling H. The discharge After the dishes are thoroughly washed with; the soapy. water the overflow II is lifted and the tray is drained and the accumulations in the] sump screen disposed 0!. Then rinsing water is .admitted through the valve 28 and theopera'tion- 1 repeated. Meantime clean water is admitted 2 until all the accumulation fromthe dishes overflows or descends into the sump l0. 4

To rinse the tops of the dishes in the rack 2| the top spray 40 is provided. It isconnected dithe motor circuit and stops the pump to prevent splash of water through the open door. Since the water is scalding hot and soapy there is" danger to the operator, or possible property damage without these precautionary stop switches 46, 41.

In the motor circuit shown in Fig. 3, the current flows in over the wire 48, across the main switch 49, the motor I 5, the two stop switches 46,

v 41, and back over the wire 5|, to the source of I power. When either door-is opened the corre- ..sponding switch 46, 41 automatically opens to break the circuit and stop the motor and the water distributing assembly driven thereby. Having thus described this invention what is claimed and desired to be secured by Letters Patent is:

1. A dish washing machine having a tray with water distributing means therein; a m'otoractu- I ating said distributing means; a pair oftelescopingdoors pivotedon a common horizontal axis on said tray; and means actuated by said doors for automatically stopping said motor when 1 either of said doors is opened.

2. A dish washing machine having a tray with water distributing means therein; a motor actuating said distributing means; a water valve having an outlet coupling extending into said tray; a pivot on said tray opposite said outlet coupling; a door pivoted on said pivot and said outlet coupling; and means for automatically stopp said motor when said door is opened.

3. A dish washing machine having a tray with water distributing means therein; a water outlet coupling and a soap outlet pipe alined on opposite sides of said tray; a pair of telescoping doors pivoted on said outlet coupling and outlet pipe;

and means for automatically stopping said water distributing means when either of said doors is opened.

4. A dish washing machine having a tray with water distributing means therein; a motor actuating said distributing means; a water valve having an outlet coupling extending into said tray;

a soap outlet pipe on said tray alined with said water outlet coupling; a pair of telescoping doors pivoted. on said outlet coupling and outlet pipe; stop switches on said tray in operative relation to said doors respectivelyyan electric circuit including-said motor and said switches therein; whereby said motor is stopped or started when said doors are openedor closed respectively.

HERBERT H. FISHER. 

